On March 1 2016 it appears the CEO (Catholic Education Office) of Melbourne finally took the old DNS server offline. For the VIC schools that use the CEO as their upstream Domain Name Services Forwarder, if you were using 10.160.254.5 still (or possibly even 180.95.16.251) you might find that today it no longer works.

The new DNS servers to use as forwarders from your local DNS server are:180.95.16.16180.95.16.17